In the movie, after running from the Hammer-Hand Guy in Chinatown, they are stopped by Penny Lane. When it cuts to the boys, look behind James' shoulder. You can see the hammer hand guy. After the break, look behind James' shoulder again. Hammer Hand Guy is gone again. Then, amazingly, when they climb into the van again, the Hammer Hand Guy is back in the alley. Did he sit and take a break while the guys were talking?